Welcome to the AC Tropical Fish aquarium forum. Our aquarium forum is the place to discuss any aquarium related issue in a friendly environment. Our aquarium forum welcomes aquarists of all levels from beginners to experts. Please ask a question in the how to section of our forum or read the FAQ section if you have any questions. register to and become a part of our friendly aquarium forum community today.

Even in a 55g I wouldn't put an angel with barbs, no way. Not after owning barbs and angels (in separate tanks). The angels are so slow and floaty I sometimes wonder how they live at all in the wild without just getting mauled all the time. And TBs are wild things.

A smaller sized cichlid might be alright with barbs though... Like a Sajica or convict. Maybe some Keyholes.

No I don't think a tetra tank would be boring but I'm kind of biased LOL.

You have so many choices and best of all most of them are peaceful.

Rummy boses and Cardinals look great together. You could substitute Neons for the Cardinals.

Another way to go, even if their not tetras (I beleive it was already suggested) would be Harlequin rasboras.

Perfection is not attainable, but if we chase perfection we can catch excellence.
Once you learn to quit, it becomes a habit. -Vince Lombardi
“Be more concerned with your character than your reputation, because your character is what you really are, while your reputation is merely what others think you are.” ― John WoodenSandy Hook Elementary......Lest We Forget
See my profile for my tanks and what fish I keep

Or a killie tank, but that would pretty expensive if you wanted to fill it with them. A real fun tank would be if you filled it up with like 10 black and yellow platys and 10 of another platy you like. Or you can go with a gourami tank, which are some real pretty fish. Like everyone else said, there are a lot of choices.